Does the Korg M1 Have a self-test diagnostic mode?

I’ve looked in the service manual for the Korg M1 and can’t find a way to boot the M1 into a self-test diagnostic mode, was wondering if it could be done? Thanks

http://www.korgforums.com/forum/phpBB2/viewtopic.php?t=77298

You sent instructions for the Korg Karma, not M1. Not sure how this is supposed to help?

https://www.korgusa.com/Support/Korg/dlrsvc.aspx

Not sure if you are aware of this, but Korg doesn’t offer support for 30-year-old equipment. Customer support for the M1 has long been discontinued…

No I’m afraid not. The first time I saw anything like this in a Korg it was a Wavestation a few years later. What’s it doing? Almost all issues go back to the PSU or backup battery. I got an M1R a couple months back and the PSU was a disaster, severely leaking caps, resistor leads burned off, inductors overheated and cracked open. $40 worth of components and a good cleaning and it’s purring like a kitten.